Global Patent Index - EP 2023224 A1

EP 2023224 A1 2009-02-11 - Numeric control device of a machine tool for detecting abnormality of a spindle

Title (en)

Numeric control device of a machine tool for detecting abnormality of a spindle

Title (de)

Numerische Steuervorrichtung einer Werkzeugmaschine zur Fehlererkennung in einer Spindel

Title (fr)

Dispositif de commande numérique d'une machine-outil pour détecter l'anomalie d'une broche

Publication

EP 2023224 A1 (EN)

Application

EP 08012299 A

Priority

JP 2007191278 A

Abstract (en)

A numeric control device with a simple structure of a machine tool, capable of detecting a defect of a spindle or a spindle motor of the machine tool and automatically informing an operator of the defect. A numeric control device has a first storing part, a calculating part and a judging part. The first storing part stores master vibration data of the spindle or the spindle motor, the master vibration data being prepared by associating data of the vibration outputted from a vibration sensor arranged on the spindle or the spindle motor with an operation pattern for detecting the defect of the spindle or the spindle motor. When a difference value between the master vibration data and newly obtained data exceeds a predetermined reference value, the judging part determines that the new data is abnormal.

IPC 8 full level (invention and additional information)

G05B 19/4065 (2006.01)

CPC (invention and additional information)

G05B 19/406 (2013.01); B23Q 17/12 (2013.01); G05B 2219/34465 (2013.01); G05B 2219/37226 (2013.01); G05B 2219/37391 (2013.01); G05B 2219/37435 (2013.01); G05B 2219/50197 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

DE

Designated extension state (EPC)

AL BA MK RS

EPO simple patent family

EP 2023224 A1 20090211; CN 101354578 A 20090128; US 2009030545 A1 20090129

INPADOC legal status


2010-02-17 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20090812

2009-10-14 [AKX] PAYMENT OF DESIGNATION FEES

- Designated State(s): DE

2009-02-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

2009-02-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA MK RS